EP1567792B1 - Device for supplying a drive element with hydraulic medium - Google Patents

Device for supplying a drive element with hydraulic medium Download PDF

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Publication number
EP1567792B1
EP1567792B1 EP03776876A EP03776876A EP1567792B1 EP 1567792 B1 EP1567792 B1 EP 1567792B1 EP 03776876 A EP03776876 A EP 03776876A EP 03776876 A EP03776876 A EP 03776876A EP 1567792 B1 EP1567792 B1 EP 1567792B1
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EP
European Patent Office
Prior art keywords
disk set
differential case
plug
channels
drive element
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Expired - Fee Related
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EP03776876A
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German (de)
French (fr)
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EP1567792A1 (en
Inventor
Hans Fleischmann
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Audi AG
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Audi AG
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/04—Final output mechanisms therefor; Actuating means for the final output mechanisms a single final output mechanism being moved by a single final actuating mechanism
    • F16H63/06—Final output mechanisms therefor; Actuating means for the final output mechanisms a single final output mechanism being moved by a single final actuating mechanism the final output mechanism having an indefinite number of positions
    • F16H63/065—Final output mechanisms therefor; Actuating means for the final output mechanisms a single final output mechanism being moved by a single final actuating mechanism the final output mechanism having an indefinite number of positions hydraulic actuating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/32—Friction members
    • F16H55/52—Pulleys or friction discs of adjustable construction
    • F16H55/56—Pulleys or friction discs of adjustable construction of which the bearing parts are relatively axially adjustable

Definitions

  • the invention relates to a device for supplying a rotatably mounted in a gear housing, serving as a drive element pulley set of a belt transmission with hydraulic medium, according to the preamble of claim 1.
  • a transmission housing rotatably mounted drive elements - this may be only a disc set of a belt drive in a motor vehicle
  • the hydraulically adjustable floating disk is axially displaceable relative to a fixed disk - via channels in the shaft carrying the drive element of a with the hydraulic control connected, coaxially arranged element.
  • this requires a considerable manufacturing effort and a not inconsiderable weakening of said shaft by the required shaft holes.
  • the object of the invention is to propose a device which enables reliable hydraulic supply of serving as a drive element pulley set of a belt transmission.
  • the generic DE 197 57 232 A1 shows a belt drive with an adjustable pulley and a differential housing, which is integral with the shaft of the pulley set.
  • the DE 102 03 944 A1 shows a belt transmission with an adjustable pulley set, in which the hydraulic fluid is supplied to adjust the pulley set on the shaft of the pulley set.
  • the US 4,640,152 shows a multi-stage transmission according to the planetary gear type, in which for switching the gear ratios clutches are hydraulically closed and released.
  • a clutch is supplied with hydraulic fluid via a portion of a bearing structure by means of connecting pipes which connect the fixed gear housing to the bearing structure.
  • the drive element is rotationally connected to the differential housing and as Anschtusstress at least serves a tightly inserted into the two channels plug-in tube, which extends directly from the differential housing to the drive element.
  • the at least one plug pipe thus runs around with the hydraulic medium supplying the differential housing; Shaft holes can therefore be omitted.
  • the at least one plug-in tube forms a connection which permits limited cardanic movements and axial compensation between the drive element and the differential housing; This results in a reliable pressure medium supply of the drive element even with unfavorable tolerance pairings or operating conditions (temperature, load) or run-out errors.
  • the at least one plug-in tube can extend radially within a rolling bearing provided between the drive element and the adjacently arranged differential housing.
  • a supply of the drive element is also possible via at least one plug-in tube, when a gearbox storage between the drive element and the differential housing is displayed.
  • the inner ring of the rolling bearing can sit on a neck of the drive element and extend the at least one plug-in tube in a corresponding recess of the neck.
  • the plug-in tube can thus be partially integrated without structural and spatial overhead in the drive element.
  • the plug-in tube can be provided with a radial projection, by means of which it is frontally between the inner ring the rolling bearing and the subsequent drive element is held.
  • the plug-in tube can carry at both ends sealing rings for sealing with the adjoining channels in the drive element and the differential housing. This allows an uncomplicated mating of the transmission elements and a vibration-insensitive and even with limited gimbal and axial relative movements absolutely dense leadership of the hydraulic medium.
  • a plurality of plug pipes distributed over the circumference of the drive element can be provided, which correspond with corresponding channels in the drive element and in the differential housing.
  • the plug pipes can be used to control either larger amounts of hydraulic fluid at the same time or different hydraulic functions for separate channels.
  • the channel guide can be simplified within the drive element, because the plug pipes possibly allow direct supply of the hydraulic medium in the annular hydraulic chamber.
  • a rotationally locking connection between the drive element and the differential housing can advantageously be provided a spline, which is formed radially inside of the rolling bearing on a neck of the drive element and on an annular projection of the differential housing as a plug connection.
  • the drive element is a driven pulley set of a continuously variable belt transmission for motor vehicles and the differential housing is a differential housing of a Torsendifferentiales, the output to an axis of the motor vehicle through a hollow shaft of the pulley set passes and through the channels and the plug pipes the transmission ratio of the pulley set to the belt means is controllable.
  • Torsen differential is known in mechanical engineering and especially in transmission technology.
  • the attached schematic drawing shows a longitudinal section of a device for hydraulically supplying the driven pulley set of a belt drive for a motor vehicle.
  • 10 generally designates a drive assembly which is rotatably mounted in a gearbox 12 only partially shown and which is composed essentially of a only partially visible driven pulley 14 as a drive element and a coaxial thereto adjacent Eisenachsdifferential or Torsendifferential 16 as a further element.
  • the pulley set 14 is part of a belt drive for motor vehicles and acts in a known manner via a chain or a link belt with a arranged on a transmission input shaft, driving pulley set (not shown) together.
  • the driven pulley set 14 has a fixed disk (not visible in the drawing), which forms a common component with an adjoining hollow shaft 18.
  • the fixed disk is mounted axially non-displaceably in a wall of the transmission housing 12 via a double-row tapered roller bearing.
  • the loose disk 20 On the hollow shaft 18, the loose disk 20 is guided axially displaceable, wherein a designated 22 wedge connection produces a positive connection in the circumferential direction.
  • the loose disk 20 is biased as shown in the drawing to the left by means of a helical compression spring 24, which is supported on a guide portion 26.
  • the guide portion 26 is fixedly connected to the hollow shaft 18 by an annular laser weld at 28.
  • annular hydraulic chambers 30, 32 are formed, sealed by generally designated 36 sealing rings and by a are divided annular actuating piston 38.
  • the fixedly connected via a flare connection 40 with the guide portion 26 actuating piston 38 acts at a corresponding pressurization of the hydraulic chamber 30, 32 as a reaction member for the corresponding axial adjustment of the floating disk 20th
  • the guide portion 26 has an annular neck 42, on the outer circumference of the inner ring 44 of a rolling bearing or ball bearing 46 is seated.
  • the ball bearing 46 is in a transmission housing wall 48 received in a corresponding recess 50 and thus acts as a further pivot bearing for the pulley 14th
  • a generally designated 52 spline is incorporated approximately in the plane of rotation of the ball bearing 46, which cooperates with a corresponding spline on a sleeve-shaped projection 54 of the differential housing 56 of the Torsendifferentiales 16 as a driving connection.
  • the differential housing 56 three uniformly distributed over the circumference of the pairs of worm gears 58 are mounted in a known manner, which are in engagement with corresponding driven wheels 60, 62.
  • the output gears 60, 62 are rotationally connected to output shafts 64, 66, of which the output shaft 64 through the hollow shaft 18 through an unillustrated drive pinion and a front differential, the front wheels of the motor vehicle and the output shaft 66 via a connected propeller shaft and a rear differential, the rear wheels of the motor vehicle drives.
  • the drive shaft 64 is supported in addition to the bearing, not shown in the region of the drive pinion in a loading direction via a thrust bearing 68 on the hollow shaft 18, wherein a stop ring 70 is held on a split in an annular groove 72 retaining ring 74.
  • the Torsendifferential 16 or its functional parts are oiled with the lubricating oil from the front differential, not shown, wherein a provided in the output shaft 64 feed channel 76 opens into the differential housing 56.
  • the return of the lubricating oil takes place in the opposite direction through the hollow shaft 18 therethrough, wherein in addition the thrust bearing 68 also two radially supporting needle bearing 78 (it is only a needle bearing 78 can be seen, the second is positioned approximately in the region of the fixed disk) between the hollow shaft 18 and the output shaft 64 are oiled.
  • the Torsendifferential 16 is completely encapsulated to ensure only a lubrication of the described functional parts with the differential lubricating oil (a hypoid oil).
  • a compensating housing 56 enclosing, annular cover 80 is provided, which seals in conjunction with sealing rings 82, the differential housing 56 to the outside.
  • Another sealing ring 84 is inserted in the region of the spline 52 between the hollow shaft 18 and the sleeve-shaped projection 54 of the differential housing 56.
  • the frontal sealing of the differential housing 56 finally causes a tubular piston ring carrier 86, the connecting flange 88 with a further sealing ring 90 tightly with the differential housing 56 and an axial seal (not shown) is screwed (screws 92).
  • the piston ring carrier 86 and accordingly the differential housing 56 is rotatably supported by a further bearing or ball bearing 94 in a corresponding, housing-fixed receptacle 96 directly to the flange 88, wherein the equipped with piston rings 98 in corresponding outer grooves 99 ring portion 97 of the piston ring carrier 86 as shown into a cylindrical bore 100 of the receptacle 96 having housing part 102 protrudes.
  • a rotationally symmetrical sealing bush 104 inserted into the piston ring carrier 86 projects axially beyond the annular section 97 and is sealed to the housing part 102 via a shaft seal 124, so that no hydraulic medium from the channels 106, 108 can escape.
  • the channels 106 in the housing part 102 can be seen via the channels 108 in the piston ring carrier 86 formed by longitudinal grooves via the channels 110 and integrated in the differential housing 56 finally via the corresponding channels 112 in the guide section 26 (only one channel 112 can be seen in the sectional view of the drawing) the hydraulic chambers 30, 32, 32a are mutually acted upon by a pressurized hydraulic medium for controlling the drive ratio of the belt transmission.
  • the hydraulic connection between the channels 110 in the differential housing 56 and the channels 112 in the guide section 26 are formed by three plug tubes 114.
  • the plug-in tubes 114 protrude each with the interposition of sealing rings 116 on the one hand in a corresponding end-side recess of the guide portion 26 and the differential housing 56, wherein they are viewed in cross section by semicircular and radially outwardly open recesses 118 of the guide portion 26 within the inner ring 44 of the ball bearing 46th passed through.
  • the plug-in tubes 114 are integrally formed by these, radial projections 120 between the inner ring 44 and a frontal recess 122 of Guide section 26 held.
  • the axial guidance the plug-in tube can be ensured by stopping the faces.

Description

Die Erfindung betrifft eine Vorrichtung zum Versorgen eines drehbar in einem Getriebegehäuse gelagerten, als Antriebselement dienenden Scheibensatzes eines Umschlingungsgetriebes mit Hydraulikmedium, gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a device for supplying a rotatably mounted in a gear housing, serving as a drive element pulley set of a belt transmission with hydraulic medium, according to the preamble of claim 1.

In der Regel werden in einem Getriebegehäuse drehbar gelagerte Antriebselemente - dies kann nur beispielsweise ein Scheibensatz eines Umschlingungsgetriebes in einem Kraftfahrzeug sein, dessen hydraulisch verstellbare Losscheibe relativ zu einer Festscheibe axial verschiebbar ist - über Kanäle in der das Antriebselement tragenden Welle von einem mit der hydraulischen Steuerung verbundenem, koaxial angeordnetem Element übertragen. Insbesondere wenn für die hydraulische Steuerung mehrere separate Kanäle erforderlich sind, bedingt dies einen erheblichen fertigungstechnischen Aufwand und eine nicht unbeträchtliche Schwächung der besagten Welle durch die erforderlichen Wellenbohrungen.In general, in a transmission housing rotatably mounted drive elements - this may be only a disc set of a belt drive in a motor vehicle, the hydraulically adjustable floating disk is axially displaceable relative to a fixed disk - via channels in the shaft carrying the drive element of a with the hydraulic control connected, coaxially arranged element. In particular, when several separate channels are required for the hydraulic control, this requires a considerable manufacturing effort and a not inconsiderable weakening of said shaft by the required shaft holes.

Aufgabe der Erfindung ist es, eine Vorrichtung vorzuschlagen, die eine zuverlässige hydraulische Versorgung eines als Antriebselement dienenden Scheibensatzes eines Umschlingungsgetriebes ermöglicht.The object of the invention is to propose a device which enables reliable hydraulic supply of serving as a drive element pulley set of a belt transmission.

Diese Aufgabe wird mit den Merkmalen des Patentanspruches 1 gelöst. Vorteilhafte Weiterbildungen der Erfindung sind in den weiteren Patentansprüchen angeführt.This object is achieved with the features of claim 1. Advantageous developments of the invention are set forth in the further claims.

Die gattungsgemäße DE197 57 232 A1 zeigt ein Umschlingungsgetriebe mit einem verstellbaren Scheibensatz und einem Ausgleichsgetriebegehäuse, das integral mit der Welle des Scheibensatzes ausgebildet ist.The generic DE 197 57 232 A1 shows a belt drive with an adjustable pulley and a differential housing, which is integral with the shaft of the pulley set.

Die DE 102 03 944 A1 zeigt ein Umschlingungsgetriebe mit einem verstellbaren Scheibensatz, bei dem das Hydraulikfluid zum Verstellen des Scheibensatzes über die Welle des Scheibensatzes zugeführt wird.The DE 102 03 944 A1 shows a belt transmission with an adjustable pulley set, in which the hydraulic fluid is supplied to adjust the pulley set on the shaft of the pulley set.

Die US 4,640,152 zeigt ein mehrstufiges Getriebe nach der Planetengetriebebauart, bei dem zum Schalten der Gangstufen Kupplungen hydraulisch geschlossen und gelüftet werden. Eine Kupplung wird über einen Abschnitt eines Lageraufbaus mittels Verbindungsrohre, die das ortsfeste Getriebegehäuse mit dem Lageraufbau verbinden, mit Hydraulikfluid versorgt.The US 4,640,152 shows a multi-stage transmission according to the planetary gear type, in which for switching the gear ratios clutches are hydraulically closed and released. A clutch is supplied with hydraulic fluid via a portion of a bearing structure by means of connecting pipes which connect the fixed gear housing to the bearing structure.

Nach der Erfindung ist das Antriebselement mit dem Ausgleichsgehäuse drehschlüssig verbunden ist und als Anschtussverbindung dient zumindest ein dicht in die beiden Kanäle eingesetztes Steckrohr, das unmittelbar von dem Ausgleichsgehäuse zum Antriebselement verläuft. Das zumindest eine Steckrohr läuft somit mit dem das Hydraulikmedium zuführendem Ausgleichsgehäuse um; Wellenbohrungen können demzufolge entfallen. Ferner bildet das zumindest eine Steckrohr eine Verbindung, die begrenzt kardanische Bewegungen und einen axialen Ausgleich zwischen dem Antriebselement und dem Ausgleichsgehäuse zulässt; daraus resultiert eine auch bei ungünstigen Toleranzpaarungen bzw. Betriebsbedingungen (Temperatur, Last) oder Planlauffehlern zuverlässige Druckmittelversorgung des Antriebselementes.According to the invention, the drive element is rotationally connected to the differential housing and as Anschtussverbindung at least serves a tightly inserted into the two channels plug-in tube, which extends directly from the differential housing to the drive element. The at least one plug pipe thus runs around with the hydraulic medium supplying the differential housing; Shaft holes can therefore be omitted. Furthermore, the at least one plug-in tube forms a connection which permits limited cardanic movements and axial compensation between the drive element and the differential housing; This results in a reliable pressure medium supply of the drive element even with unfavorable tolerance pairings or operating conditions (temperature, load) or run-out errors.

Das zumindest eine Steckrohr kann radial innerhalb eines zwischen dem Antriebselement und dem benachbart angeordnetem Ausgleichsgehäuse vorgesehenem Wälzlagers verlaufen. Damit ist eine Versorgung des Antriebselementes auch dann über zumindest ein Steckrohr ermöglicht, wenn getriebetechnisch eine Lagerung zwischen dem Antriebselement und dem Ausgleichsgehäuse angezeigt ist.The at least one plug-in tube can extend radially within a rolling bearing provided between the drive element and the adjacently arranged differential housing. Thus, a supply of the drive element is also possible via at least one plug-in tube, when a gearbox storage between the drive element and the differential housing is displayed.

Bevorzugt kann dabei der Innenring des Wälzlagers auf einem Hals des Antriebselementes sitzen und das zumindest eine Steckrohr in einer korrespondierenden Ausnehmung des Halses verlaufen. Das Steckrohr kann damit ohne baulichen und räumlichen Mehraufwand in das Antriebselement teilweise integriert sein.Preferably, the inner ring of the rolling bearing can sit on a neck of the drive element and extend the at least one plug-in tube in a corresponding recess of the neck. The plug-in tube can thus be partially integrated without structural and spatial overhead in the drive element.

Zur einfachen axialen Sicherung kann das Steckrohr mit einem radialen Vorsprung versehen sein, mittels dem es stirnseitig zwischen dem Innenring des Wälzlagers und dem anschließenden Antriebselement gehalten ist.For easy axial securing the plug-in tube can be provided with a radial projection, by means of which it is frontally between the inner ring the rolling bearing and the subsequent drive element is held.

Ferner kann zur einfachen Montage der Getriebeelemente das Steckrohr an beiden Enden Dichtringe zur Abdichtung mit den anschließenden Kanälen im Antriebselement und dem Ausgleichsgehäuse tragen. Dies ermöglicht ein unkompliziertes Zusammenstecken der Getriebeelemente und eine schwingungsunempfindliche und auch bei begrenzt kardanischen und axialen Relativbewegungen absolut dichte Führung des Hydraulikmediums.Further, for easy installation of the transmission elements, the plug-in tube can carry at both ends sealing rings for sealing with the adjoining channels in the drive element and the differential housing. This allows an uncomplicated mating of the transmission elements and a vibration-insensitive and even with limited gimbal and axial relative movements absolutely dense leadership of the hydraulic medium.

Besonders vorteilhaft können mehrere, über den Umfang des Antriebselementes verteilte Steckrohre vorgesehen sein, die mit entsprechenden Kanälen im Antriebselement und im Ausgleichsgehäuse korrespondieren. Über die Steckrohre können entweder gleichzeitig größere Hydraulikmengen oder bei separaten Kanälen verschiedene Hydraulikfunktionen gesteuert werden.Particularly advantageously, a plurality of plug pipes distributed over the circumference of the drive element can be provided, which correspond with corresponding channels in the drive element and in the differential housing. The plug pipes can be used to control either larger amounts of hydraulic fluid at the same time or different hydraulic functions for separate channels.

Des weiteren können über die Kanäle und Steckrohre eine ringförmige Hydraulikkammer mit einem Stellkolben zur Verstellung des Antriebselementes versorgbar sein. Durch die Verwendung der Steckrohre kann neben den vorstehenden Vorteilen auch die Kanalführung innerhalb des Antriebselementes vereinfacht werden, weil die Steckrohre ggf. eine direkte Zuführung des Hydraulikmediums in die ringförmige Hydraulikkammer ermöglichen.Furthermore, can be supplied via the channels and plug pipes an annular hydraulic chamber with a control piston for adjusting the drive element. By using the plug-in pipes in addition to the above advantages, the channel guide can be simplified within the drive element, because the plug pipes possibly allow direct supply of the hydraulic medium in the annular hydraulic chamber.

Als drehschlüssige Verbindung zwischen dem Antriebselement und dem Ausgleichsgehäuse kann vorteilhaft eine Keilverzahnung vorgesehen sein, die radial innerhalb des Wälzlagers an einem Hals des Antriebselementes und an einem ringförmigen Vorsprung des Ausgleichsgehäuses als Steckverbindung ausgebildet ist. Dies ermöglicht eine baulich günstige und kompakte Getriebekonstruktion, die zudem eine weitere Montagevereinfachung und einen axialen Toleranzausgleich ergibt.As a rotationally locking connection between the drive element and the differential housing can advantageously be provided a spline, which is formed radially inside of the rolling bearing on a neck of the drive element and on an annular projection of the differential housing as a plug connection. This allows a structurally favorable and compact gear design, which also results in a further simplification of the assembly and an axial tolerance compensation.

Schließlich kann in einer bevorzugten Anwendung der Erfindung das Antriebselement ein getriebener Scheibensatz eines stufenlosen Umschlingungsgetriebes für Kraftfahrzeuge und das Ausgleichsgehäuse ist ein Ausgleichsgehäuse eines Torsendifferentiales sein, wobei der Abtrieb zur einen Achse des Kraftfahrzeuges durch eine Hohlwelle des Scheibensatzes hindurch verläuft und über die Kanäle und die Steckrohre das Übersetzungsverhältnis des Scheibensatzes zum Umschlingungsmittel steuerbar ist. Der Begriff Torsendifferential ist im Maschinenbau und speziell in der Getriebetechnik bekannt.Finally, in a preferred application of the invention, the drive element is a driven pulley set of a continuously variable belt transmission for motor vehicles and the differential housing is a differential housing of a Torsendifferentiales, the output to an axis of the motor vehicle through a hollow shaft of the pulley set passes and through the channels and the plug pipes the transmission ratio of the pulley set to the belt means is controllable. The term Torsen differential is known in mechanical engineering and especially in transmission technology.

Ein Ausführungsbeispiel der Erfindung ist im Folgenden mit weiteren Einzelheiten näher beschrieben.An embodiment of the invention is described in more detail below with further details.

Die anliegende schematische Zeichnung zeigt in einem Längsschnitt eine Vorrichtung zum hydraulischen Versorgen des getriebenen Scheibensatzes eines Umschlingungsgetriebes für ein Kraftfahrzeug.The attached schematic drawing shows a longitudinal section of a device for hydraulically supplying the driven pulley set of a belt drive for a motor vehicle.

In der Zeichnung bezeichnet 10 allgemein eine Antriebsanordnung, die drehbar in einem nur teilweise dargestelltem Getriebegehäuse 12 gelagert ist und die sich im wesentlichen aus einem nur teilweise ersichtlichen getriebenen Scheibensatz 14 als Antriebselement und einem koaxial dazu benachbartem Zwischenachsdifferential bzw. Torsendifferential 16 als weiteres Element zusammensetzt.In the drawing, 10 generally designates a drive assembly which is rotatably mounted in a gearbox 12 only partially shown and which is composed essentially of a only partially visible driven pulley 14 as a drive element and a coaxial thereto adjacent Zwischenachsdifferential or Torsendifferential 16 as a further element.

Der Scheibensatz 14 ist Teil eines Umschlingungsgetriebes für Kraftfahrzeuge und wirkt in bekannter Weise über eine Kette oder ein Gliederband mit einem auf einer Getriebeeingangswelle angeordneten, antreibenden Scheibensatz (nicht dargestellt) zusammen.The pulley set 14 is part of a belt drive for motor vehicles and acts in a known manner via a chain or a link belt with a arranged on a transmission input shaft, driving pulley set (not shown) together.

Der getriebene Scheibensatz 14 weist eine Festscheibe (auf der Zeichnung nicht ersichtlich) auf, die ein gemeinsames Bauteil mit einer daran anschließenden Hohlwelle 18 bildet. Die Festscheibe ist in einer Wand des Getriebegehäuses 12 über ein zweireihiges Kegelrollenlager axial unverschiebbar gelagert.The driven pulley set 14 has a fixed disk (not visible in the drawing), which forms a common component with an adjoining hollow shaft 18. The fixed disk is mounted axially non-displaceably in a wall of the transmission housing 12 via a double-row tapered roller bearing.

Auf der Hohlwelle 18 ist die Losscheibe 20 axial verschiebbar geführt, wobei eine mit 22 bezeichnete Keilverbindung einen Formschluss in Umfangsrichtung herstellt. Dabei ist die Losscheibe 20 wie ersichtlich auf der Zeichnung nach links mittels einer Schraubendruckfeder 24 vorgespannt, die an einem Führungsabschnitt 26 abgestützt ist. Der Führungsabschnitt 26 ist durch eine ringförmige Laserschweißverbindung bei 28 fest mit der Hohlwelle 18 verbunden.On the hollow shaft 18, the loose disk 20 is guided axially displaceable, wherein a designated 22 wedge connection produces a positive connection in the circumferential direction. The loose disk 20 is biased as shown in the drawing to the left by means of a helical compression spring 24, which is supported on a guide portion 26. The guide portion 26 is fixedly connected to the hollow shaft 18 by an annular laser weld at 28.

Zur Verstellung der Losscheibe 20 relativ zur nicht dargestellten Festscheibe sind zwischen dem Führungsabschnitt 26 und der Losscheibe 20 mittels zusammengeschweißter und an der Losscheibe 20 festgelegter Ringbleche 34, 35 zwei ringförmige Hydraulikkammern 30, 32 gebildet, die durch allgemein mit 36 bezeichnete Dichtringe abgedichtet und durch einen ringförmigen Stellkolben 38 unterteilt sind. Der fest über eine Bördelverbindung 40 mit dem Führungsabschnitt 26 verbundene Stellkolben 38 wirkt bei entsprechender Druckbeaufschlägung der Hydraulikkammer 30, 32 als Reaktionsglied zur entsprechenden axialen Verstellung der Losscheibe 20.To adjust the floating disk 20 relative to the fixed disk, not shown, between the guide portion 26 and the floating disk 20 by means welded together and fixed to the loose disk 20 ring plates 34, 35 two annular hydraulic chambers 30, 32 are formed, sealed by generally designated 36 sealing rings and by a are divided annular actuating piston 38. The fixedly connected via a flare connection 40 with the guide portion 26 actuating piston 38 acts at a corresponding pressurization of the hydraulic chamber 30, 32 as a reaction member for the corresponding axial adjustment of the floating disk 20th

Der Führungsabschnitt 26 weist einen ringförmigen Hals 42 auf, auf dessen Außenumfang der Innenring 44 eines Wälzlagers bzw. Kugellagers 46 sitzt. Das Kugellager 46 ist in einer Getriebegehäusewand 48 in einer entsprechenden Ausnehmung 50 aufgenommen und wirkt somit als weitere Drehlagerung für den Scheibensatz 14.The guide portion 26 has an annular neck 42, on the outer circumference of the inner ring 44 of a rolling bearing or ball bearing 46 is seated. The ball bearing 46 is in a transmission housing wall 48 received in a corresponding recess 50 and thus acts as a further pivot bearing for the pulley 14th

Am Innenumfang des ringförmigen Halses 42 ist etwa in der Rotationsebene des Kugellagers 46 eine allgemein mit 52 bezeichnete Keilverzahnung eingearbeitet, die mit einer korrespondierenden Keilverzahnung auf einem hülsenförmigen Vorsprung 54 des Ausgleichsgehäuses 56 des Torsendifferentiales 16 als triebliche Verbindung zusammenwirkt.On the inner circumference of the annular neck 42, a generally designated 52 spline is incorporated approximately in the plane of rotation of the ball bearing 46, which cooperates with a corresponding spline on a sleeve-shaped projection 54 of the differential housing 56 of the Torsendifferentiales 16 as a driving connection.

In dem Ausgleichsgehäuse 56 sind in bekannter Weise drei gleichmäßig über dessen Umfang verteilte Schneckenräderpaare 58 gelagert, die mit entsprechenden Abtriebsrädern 60, 62 in Eingriff sind. Die Abtriebsräder 60, 62 sitzen drehschlüssig auf Abtriebswellen 64, 66, von denen die Abtriebswelle 64 durch die Hohlwelle 18 hindurch über ein nicht dargestelltes Antriebsritzel und ein vorderes Differential die Vorderräder des Kraftfahrzeuges und die Abtriebswelle 66 über eine angeschlossene Kardanwelle und ein hinteres Differential die Hinterräder des Kraftfahrzeuges antreibt.In the differential housing 56 three uniformly distributed over the circumference of the pairs of worm gears 58 are mounted in a known manner, which are in engagement with corresponding driven wheels 60, 62. The output gears 60, 62 are rotationally connected to output shafts 64, 66, of which the output shaft 64 through the hollow shaft 18 through an unillustrated drive pinion and a front differential, the front wheels of the motor vehicle and the output shaft 66 via a connected propeller shaft and a rear differential, the rear wheels of the motor vehicle drives.

Die Antriebswelle 64 ist neben der nicht dargestellten Lagerung im Bereich des Antriebsritzels in der einen Belastungsrichtung über ein Axiallager 68 an der Hohlwelle 18 abgestützt, wobei dessen einer Anlaufring 70 an einem in eine Ringnut 72 eingesprengten Sicherungsring 74 gehalten ist.The drive shaft 64 is supported in addition to the bearing, not shown in the region of the drive pinion in a loading direction via a thrust bearing 68 on the hollow shaft 18, wherein a stop ring 70 is held on a split in an annular groove 72 retaining ring 74.

Das Torsendifferential 16 bzw. dessen Funktionsteile sind mit dem Schmieröl aus dem nicht dargestelltem vorderen Differential beölt, wobei ein in der Abtriebswelle 64 vorgesehener Zuführkanal 76 in das Ausgleichsgehäuse 56 mündet. Die Rückführung des Schmieröles erfolgt in der Gegenrichtung durch die Hohlwelle 18 hindurch, wobei neben dem Axiallager 68 auch noch zwei radial abstützende Nadellager 78 (es ist nur ein Nadellager 78 ersichtlich, das zweite ist etwa im Bereich der Festscheibe positioniert) zwischen der Hohlwelle 18 und der Abtriebswelle 64 beölt werden.The Torsendifferential 16 or its functional parts are oiled with the lubricating oil from the front differential, not shown, wherein a provided in the output shaft 64 feed channel 76 opens into the differential housing 56. The return of the lubricating oil takes place in the opposite direction through the hollow shaft 18 therethrough, wherein in addition the thrust bearing 68 also two radially supporting needle bearing 78 (it is only a needle bearing 78 can be seen, the second is positioned approximately in the region of the fixed disk) between the hollow shaft 18 and the output shaft 64 are oiled.

Das Torsendifferential 16 ist vollständig gekapselt ausgebildet, um nur eine Beölung der beschriebenen Funktionsteile mit dem Differential-Schmieröl (einem Hypoidöl) sicherzustellen. Dazu ist ein das Ausgleichsgehäuse 56 umschließendes, ringförmiges Abdeckteil 80 vorgesehen, das in Verbindung mit Dichtringen 82 das Ausgleichsgehäuse 56 nach außen abdichtet. Ein weiterer Dichtring 84 ist im Bereich der Keilverzahnung 52 zwischen der Hohlwelle 18 und dem hülsenförmigen Vorsprung 54 des Ausgleichsgehäuses 56 eingesetzt.The Torsendifferential 16 is completely encapsulated to ensure only a lubrication of the described functional parts with the differential lubricating oil (a hypoid oil). For this purpose, a compensating housing 56 enclosing, annular cover 80 is provided, which seals in conjunction with sealing rings 82, the differential housing 56 to the outside. Another sealing ring 84 is inserted in the region of the spline 52 between the hollow shaft 18 and the sleeve-shaped projection 54 of the differential housing 56.

Die stirnseitige Abdichtung des Ausgleichsgehäuses 56 bewirkt schließlich ein rohrförmiger Kolbenringträger 86, dessen Anschlussflansch 88 mit einem weiteren Dichtring 90 dicht mit dem Ausgleichsgehäuse 56 und einer Axialdichtung (nicht dargestellt) verschraubt ist (Schrauben 92).The frontal sealing of the differential housing 56 finally causes a tubular piston ring carrier 86, the connecting flange 88 with a further sealing ring 90 tightly with the differential housing 56 and an axial seal (not shown) is screwed (screws 92).

Der Kolbenringträger 86 und dementsprechend das Ausgleichsgehäuse 56 ist mittels eines weiteren Wälzlagers bzw. Kugellagers 94 in einer entsprechenden, gehäusefesten Aufnahme 96 direkt an den Anschlussflansch 88 anschließend drehbar gelagert, wobei der mit Kolbenringen 98 in entsprechenden Außennuten 99 bestückte Ringabschnitt 97 des Kolbenringträgers 86 wie ersichtlich in eine zylindrische Bohrung 100 des die Aufnahme 96 aufweisenden Gehäuseteiles 102 einragt.The piston ring carrier 86 and accordingly the differential housing 56 is rotatably supported by a further bearing or ball bearing 94 in a corresponding, housing-fixed receptacle 96 directly to the flange 88, wherein the equipped with piston rings 98 in corresponding outer grooves 99 ring portion 97 of the piston ring carrier 86 as shown into a cylindrical bore 100 of the receptacle 96 having housing part 102 protrudes.

Eine in den Kolbenringträger 86 eingesetzte, rotationssymmetrische Dichtungsbüchse 104 überragt dabei axial den Ringabschnitt 97 und ist zum Gehäuseteil 102 über einen Wellendichtring 124 abgedichtet, so dass kein Hydraulikmedium aus den Kanälen 106, 108 austreten kann.A rotationally symmetrical sealing bush 104 inserted into the piston ring carrier 86 projects axially beyond the annular section 97 and is sealed to the housing part 102 via a shaft seal 124, so that no hydraulic medium from the channels 106, 108 can escape.

Über den Kolbenringträger 86 und die in diesen eingesetzte, rotationssymmetrische Dichtungsbüchse 104 können über die ersichtlichen und jeweils mit einem einheitlichen Bezugszeichen versehenen Kanäle 106 im Gehäuseteil 102, über die durch Längsnuten gebildeten Kanäle 108 im Kolbenringträger 86, über die im Ausgleichsgehäuse 56 eingearbeiteten Kanäle 110 und schließlich über die korrespondierenden Kanäle 112 im Führungsabschnitt 26 (es ist in der Schnittansicht der Zeichnung jeweils nur ein Kanal 112 ersichtlich) die Hydraulikkammern 30, 32, 32a wechselseitig mit einem unter Druck stehendem Hydraulikmedium zur Steuerung der Antriebsübersetzung des Umschlingungsgetriebes beaufschlagt werden.Via the piston ring carrier 86 and the rotationally symmetrical sealing bush 104 inserted therein, the channels 106 in the housing part 102 can be seen via the channels 108 in the piston ring carrier 86 formed by longitudinal grooves via the channels 110 and integrated in the differential housing 56 finally via the corresponding channels 112 in the guide section 26 (only one channel 112 can be seen in the sectional view of the drawing) the hydraulic chambers 30, 32, 32a are mutually acted upon by a pressurized hydraulic medium for controlling the drive ratio of the belt transmission.

Die hydraulische Verbindung zwischen den Kanälen 110 im Ausgleichsgehäuse 56 und den Kanälen 112 im Führungsabschnitt 26 sind durch drei Steckrohre 114 gebildet. Die Steckrohre 114 ragen dazu jeweils unter Zwischenschaltung von Dichtringen 116 einerseits in eine entsprechende stirnseitige Ausnehmung des Führungsabschnittes 26 und des Ausgleichsgehäuses 56 ein, wobei sie durch im Querschnitt betrachtet halbkreisförmige und radial nach außen offene Ausnehmungen 118 des Führungsabschnittes 26 innerhalb des Innenringes 44 des Kugellagers 46 hindurch geführt sind.The hydraulic connection between the channels 110 in the differential housing 56 and the channels 112 in the guide section 26 are formed by three plug tubes 114. The plug-in tubes 114 protrude each with the interposition of sealing rings 116 on the one hand in a corresponding end-side recess of the guide portion 26 and the differential housing 56, wherein they are viewed in cross section by semicircular and radially outwardly open recesses 118 of the guide portion 26 within the inner ring 44 of the ball bearing 46th passed through.

Die Steckrohre 114 (es sind zur Verstellung der Losscheibe 20 wie ausgeführt drei gleichmäßig über den Umfang des Führungsabschnittes 26 bzw. des Ausgleichsgehäuses 56 verteilte Steckrohre 114 vorgesehen) sind mittels an diese angeformte, radiale Vorsprünge 120 zwischen dem Innenring 44 und einer stirnseitigen Ausnehmung 122 des Führungsabschnittes 26 gehalten. Wahlweise kann die axiale Führung des Steckrohres auch durch Anschlag der Stirnflächen gewährleistet werden.The plug-in tubes 114 (there are provided for the adjustment of the floating disk 20 three equally spaced over the circumference of the guide portion 26 and the differential housing 56 plug-in tubes 114) are integrally formed by these, radial projections 120 between the inner ring 44 and a frontal recess 122 of Guide section 26 held. Optionally, the axial guidance the plug-in tube can be ensured by stopping the faces.

Claims (9)

  1. Device for supplying a set of discs (14) mounted rotatably in a transmission housing (12), serving as the drive element of a continuously variable transmission, with hydraulic medium by means of a hydraulic control, whereby:
    a differential case (56) is provided which is arranged coaxially with the disk set (14),
    the differential case (56) is connected in a rotationally locking manner with the disk set (14),
    the differential case (56) is provided with a first channel (110), characterised in that
    the disk set (14) is provided with a second channel (112), at least one plug tube (114) is provided which is inserted sealingly into the two channels (112, 110) as a connection and runs directly from the differential case (56) to the disk set (14), so that pressurised hydraulic medium can be fed to the disk set (14) via the first channel (110) in the differential case (56), the plug tube (114) and the second channel (112) in the disk set (14).
  2. Device according to claim 1, characterised in that the at least one plug tube (114) runs radially within a rolling contact bearing (46) provided between the disk set (14) and the adjacent differential case (56).
  3. Device according to claims 1 and 2, characterised in that the inner ring (44) of the rolling contact bearing (46) sits on a neck (42) of the disk set (14) and that at least one plug tube (114) runs within a recess (118) in the neck (42).
  4. Device according to claims 1 to 3, characterised in that the plug tube (114) is provided with a radial projection (120) by means of which it is held axially between the inner ring (44) of the rolling contact bearing (46) and the connected disk set (14) or can be held against the end faces, without a radial projection, through axial force.
  5. Device according to one or more of claims 1 to 4, characterised in that the plug tube (114) carries sealing rings (116) at both ends to seal with the connecting channels (112, 110) in the disk set (14) and the differential case (56).
  6. Device according to one or more of claims 1 to 5, characterised in that several plug tubes (114) distributed around the circumference of the disk set (14) are provided which correspond with corresponding channels (112, 110) in the disk set (14) and in the differential case (56).
  7. Device according to claim 6, characterised in that an annular hydraulic chamber (30, 32) with an actuating piston (38) for adjusting the disk set (14) can be supplied via the channels (112, 110) and the plug tubes (114).
  8. Device according to one or more of the preceding claims, characterised in that the rotationally-locking connection between the disk set (14) and the differential case (56) is a spline (52) which is formed radially within the rolling contact bearing (46) on the neck (42) of the disk set (14) and on an annular projection (54) of the differential case (56), as a plug connection.
  9. Device according to the preceding claims, characterised in that the disk set (14) is a driven disk set (14) of a continuously variable transmission for motor vehicles and the differential case (56) is a differential case (56) of a Torsen differential (16), whereby the power take-off to an axle of the motor vehicle runs through a hollow shaft (18) of the disk set (14) and the gear ratio of the disk set (14) to the belt mechanism can be controlled via the channels (112, 110) and the plug tubes (114).
EP03776876A 2002-11-28 2003-10-31 Device for supplying a drive element with hydraulic medium Expired - Fee Related EP1567792B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10255536 2002-11-28
DE10255536A DE10255536B4 (en) 2002-11-28 2002-11-28 Drive arrangement with hydraulically controlled belt transmission and with a differential gear
PCT/EP2003/012110 WO2004048815A1 (en) 2002-11-28 2003-10-31 Device for supplying a drive element

Publications (2)

Publication Number Publication Date
EP1567792A1 EP1567792A1 (en) 2005-08-31
EP1567792B1 true EP1567792B1 (en) 2008-12-24

Family

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EP03776876A Expired - Fee Related EP1567792B1 (en) 2002-11-28 2003-10-31 Device for supplying a drive element with hydraulic medium

Country Status (4)

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US (1) US7677996B2 (en)
EP (1) EP1567792B1 (en)
DE (2) DE10255536B4 (en)
WO (1) WO2004048815A1 (en)

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DE102005037510A1 (en) * 2005-08-10 2007-02-15 Zf Friedrichshafen Ag Tube connection for hydraulic components, e.g. a hydraulic pump in a gearbox, has drillings of different diameters to take the tube ends with the hydraulic pressure towards the smaller drilling
DE102007048649A1 (en) * 2007-10-10 2009-04-16 Audi Ag Drive device for motor vehicles
US8403332B2 (en) * 2009-12-28 2013-03-26 Nissan Kogyo Co., Ltd Seal member

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DE8535076U1 (en) * 1985-12-13 1986-02-20 Bergische Stahl-Industrie, 5630 Remscheid Circulating lubrication of a planetary stage with a mounted planet carrier
US5533943A (en) * 1994-04-25 1996-07-09 Toyota Jidosha Kabushiki Kaisha Planetary gear device including planetary gears each having integrally formed large and small pinions
DE19757232A1 (en) * 1997-12-22 1999-06-24 Audi Ag Drive arrangement
DE10203944A1 (en) * 2001-02-12 2002-08-14 Luk Lamellen & Kupplungsbau Continuously adjustable cone pulley gearbox for vehicle, has integral torque sensor influencing chamber pressure via valve whose throughput cross-section is varied by relative rotation of two components

Also Published As

Publication number Publication date
WO2004048815A1 (en) 2004-06-10
DE10255536B4 (en) 2005-07-28
DE10255536A1 (en) 2004-06-17
DE50310984D1 (en) 2009-02-05
US7677996B2 (en) 2010-03-16
US20060100058A1 (en) 2006-05-11
EP1567792A1 (en) 2005-08-31

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